tests of axis domain constraints

Author: alexcjohnson

test/image/baselines/axes_scaleanchor.png

@@ -9,9 +9,9 @@
     "width": 800,
     "height":500,
     "title": "fixed-ratio axes",
-    "xaxis": {"nticks": 10, "domain": [0, 0.45], "title": "shared X axis"},
+    "xaxis": {"constrain": "domain", "nticks": 10, "domain": [0, 0.45], "title": "shared X axis"},
     "yaxis": {"scaleanchor": "x", "domain": [0, 0.45], "title": "1:1"},
-    "yaxis2": {"scaleanchor": "x", "scaleratio": 0.2, "domain": [0.55,1], "title": "1:5"},
+    "yaxis2": {"constrain": "domain", "constraintoward": "bottom", "scaleanchor": "x", "scaleratio": 0.2, "domain": [0.55,1], "title": "1:5"},
     "xaxis2": {"type": "log", "domain": [0.55, 1], "anchor": "y3", "title": "unconstrained log X"},
     "yaxis3": {"domain": [0, 0.45], "anchor": "x2", "title": "Scale matches ->"},
     "yaxis4": {"scaleanchor": "y3", "domain": [0.55, 1], "anchor": "x2", "title": "Scale matches <-"},

test/image/mocks/axes_scaleanchor.json

@@ -55,14 +55,19 @@ module.exports = {
             compare: function(actual, expected, precision, msgExtra) {
                 precision = coercePosition(precision);
 
-                var tested = actual.map(function(element, i) {
-                    return isClose(element, expected[i], precision);
-                });
-
-                var passed = (
-                    expected.length === actual.length &&
-                    tested.indexOf(false) < 0
-                );
+                var passed;
+
+                if(Array.isArray(actual) && Array.isArray(expected)) {
+                    var tested = actual.map(function(element, i) {
+                        return isClose(element, expected[i], precision);
+                    });
+
+                    passed = (
+                        expected.length === actual.length &&
+                        tested.indexOf(false) < 0
+                    );
+                }
+                else passed = false;
 
                 var message = [
                     'Expected', actual, 'to be close to', expected, msgExtra